Machine foe



UNITED STATES PATENT' OFFICE.

JOHN MCADAMS, OF BOSTON, MASSACHUSETTS.

llv'lACI-IINIE FOR NUMBERING THE PAGES OF ACCOUNT-BOOKS.

Specification forming part of Letters Patent No. 8,291, dated August 12,1851; Ressued January 'To CLZZ whom it may concern useful Machine forNumbering the Pages off Account-Books, and that the followingdescription, taken in connection with the ac-l companying plate ofdrawings, constitutes a full and accurate specification of the same,wherein I have set forth the nature and principles of my said machine bywhich it may be distinguished from all others, together with such partsas I claim and desire to have secured to me by Let-ters Patent.

The figures of the accompanying plate of drawings represent my newmachine.

Figure l is a side elevation of the inachine. Fig. 2 is a plan of thesame and Fig. 3 is a longitudinal vertical section taken in the plane ofthe line A, B Fig. 2.

The object of my machine, is, to eifect the paging of account books,which has heretofore been done exclusively by hand, in an expeditiousand accurate manner; so that the pile of sheets for a book of any numberof quires may be passed through the machine and have the number of eachsuccessive page printed in any colored ink, in proper position, in theupper corner of each margin of the sheet and on both sides.

A A A in the several drawings represents the framework of the machine.

B B is the platform on which the sheets are placed to be fed into themachine.

The types a a, with the various numbers on their faces, are set in theblocks Z) b, which are connected by links c c' in the chains b c 0,-Z9 bc c. The links c c of the chains, fit over proper teeth in the peripheryof circular plates on each end of the imprinting cylinder, Z (Z, Figs.l, 2 and 3, which cylinder prints the numbers on the upper side of thesheet, the types .being so arranged in the chain, as to accommodate thebinding of the book7 and the chains being stretched round the cylindersB, C, as shown in the drawings.

The imprinting cylinder is turned by means of the treadle e e whichturns on a proper fulcrum in the framework, and is drawn up, after eachimpression, by the spiral spring f f, as shown in Fig. l. At a properpoint along the upper side of this treadle, an elongated hooked pall gg, projects upward, the hooked end of which engages with the teeth ofthe ratchet wheel 7L c-n the imprinting cylinder. The sheets are pressedup separately, until they abut against the edge of the type which hasjust made `an i1npression,the treadle is then depressed, and turns theimprinting cylinder, until the succeeding type comes into properposition, when the sheet is fed along by hand, and the impression isproduced against the periphery of the roller z' z', just beneath saidimprinting cylinder. This is for printing the pages on the upper side ofthe sheet, but after this is done, the sheet is passed to the lowerimprinting cylinder la 7:, which has type chains Z Z-Z Z, similar tothose before described, and stretched from said cylinder fr k on eachside, to the cylinder m, as shown in Fig. 3.

The imprinting cylinder lac is turned, at proper intervals, by means ofa chain belt 0 0, which passes from the roller z' z' to it, said rollerz' z' being turned by the pressure on it, of the type chains, on thefirst described imprinting cylinder Z if-as they are revolved by thetreadle. The second impression on the underside of the sheet, isproduced by means of the roller p, whose journals are arranged in theswinging boxes g Figs. 2 and 3. These boXes are connected, by the rods rr to the periphery of the drum s, as shown in Figs. l and 3,- which hasa short rotating motion imparted to it by means of the rod u u Fig. l,connecting its periphery with the treadle e e. The drawing down of theseboxes and consequently the roller 22,-presses the sheet on the face ofthe types in the type chains Z, Z and produces the impression on theunderside as desired. After this last described result is effected, thesheet is conveyed downward, behind the cylinders 7c 6,by means of thestuds or pins a the position of which, when turned is shown by red linesin loose wheels f, on said cylinder as shown by red lines in thedrawing, which wheels are turned so as to produce this effect, after theimpression and when the treadle rises, by

means of the rods b Z9 which are attached to them and to the surface ofthe drum 8. There should be bands of moleskin or other similar softsubstance, as shown at c c', passing around the roller p, against whichthe figures printed on the upper side of the sheet come, and on which alittle of the ink is taken, but this is carried along on the band aftereach impression, and does not come back again until it is dry.

By the use of type chains, it will be apparent, that I am enabled toemploy imprinting cylinders of small diameter, so that the arrangementcan be made conveniently for paging or printing on both sides of thesheet in one machine; but, in lieu of these belts, plates of largediameter may be fixed on each endroit the imprinting cylinder, wit-hsockets for the types. In order, however, to print any considerablenumber of sheets, theL f plates must be of large diameter, andtheginltchine be unwieldy-while it would not probably be, in a machineso arranged, convenient to print on more than one side at a time.

scribed.

JOHN MGADAMS. Witnesses:

EZRA LINCOLN, J osEPH GAVETT.

[FIRST PE1 NTED 1913.]

